add gdal, geos and proj4 steps, update compile to set gdal, geos and proj4 envs
fix gdal typo
add geoip
update README.md
update README.md
add README.md
Merge branch 'master' of https://github.com/shalakhin/heroku-buildpack-geodjango into shalakhin-master

Conflicts:
	Readme.md
	bin/compile